Note 1 - Summary of Operations and Significant Accounting Policies - Allowance for Doubtful Accounts Activity (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Note 1 - Summary Of Operations And Significant Accounting Policies - Allowance For Doubtful Accounts Activity Details
Balance at beginning of year	$ 288	$ 322
Amounts charged to expense	52	29
Net write-offs (recoveries)	0	(63)
Balance at beginning of year	$ 340	$ 288